Loft splines Does not close object,Animation nodes
This was a bug in the Animation Nodes addon. The problem appeared when you tried to loft cyclic splines.

The bug is fixed now. Please download a new version (uninstall the old version at first).



Btw a quick tip: when the normals of the output object show in the wrong direction it helps when you insert a "Reverse List" node as shown in the example.